Spondylitis

• Afflilated Hospital of Bengbu Medical College — Bengbu, Anhui, China
• Anhui Provincial Hospital — Hefei, Anhui, China
• Sun Yat-sen Memorial Hospital, Sun Yat-sen University — Guangzhou, Guangdong, China
• Shenzhen People's Hospital — Shenzhen, Guangdong, China

• Peking Union Medical College Hospital — Beijing, Beijing Municipality, China

• São Paulo Hospital — São Paulo, Brazil

• Renji Hospital — Shanghai, Shanghai Municipality, China

Not specified

• University Hospitals of Leicester NHS trust — Leicester, United Kingdom
• Loughborough University, National Centre for Sport and Exercise Medicine — Loughborough, United Kingdom

• Pa0008 007 — San Diego, California, United States
• Pa0008 005 — Aventura, Florida, United States
• Pa0008 003 — Hagerstown, Maryland, United States
• Pa0008 011 — Lansing, Minnesota, United States

• Rheumatology Department, Ambroise Paré Hospital — Boulogne-Billancourt, France

• Medical University of Graz — Graz, Styria, Austria

• Diakonhjemmet Hospital — Oslo, Norway